pid namespaces: round up the API

The set of functions process_session, task_session, process_group and
task_pgrp is confusing, as the names can be mixed with each other when looking
at the code for a long time.

The proposals are to
* equip the functions that return the integer with _nr suffix to
  represent that fact,
* and to make all functions work with task (not process) by making
  the common prefix of the same name.

For monotony the routines signal_session() and set_signal_session() are
replaced with task_session_nr() and set_task_session(), especially since they
are only used with the explicit task->signal dereference.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index e4f059cd986..15c6940ab04 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -536,7 +536,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
                         return error;
                 error = -EPERM;
                 if (((sig != SIGCONT) ||
-                        (process_session(current) != process_session(t)))
+                        (task_session_nr(current) != task_session_nr(t)))
                     && (current->euid ^ t->suid) && (current->euid ^ t->uid)
                     && (current->uid ^ t->suid) && (current->uid ^ t->uid)
                     && !capable(CAP_KILL))